Goq: There is a BIG chance your invitation got lost in the mail. I don’t think you should trust your intuition. Simply because it makes you feel bad. I used to make assumptions about others’ thoughts, wrongdoings etc. and it got me nowhere. It just got me to be miserable and upset.
I’d suggest you ask someone close to you to ask the Rosh Yeshiva what the matter is.
Life is full of disappointments. If you always feel victimized you will be the victim. But if you get up straight and say to yourself, “Hey, s/he won’t ruin my day. I will not go around upset because of what s/he did. I think I’m an ok person and if they disagree, it’s their problem.”
Hatzlacha Rabba.